Transmission Of Local Analog Data Via Ldcm To Remote End Function Block Ldcmtrn Called Ldcmtransmit - ABB RES670 Technical Manual

1MRK 511 408-UUS A
20.2
20.2.1
Phasor measurement unit RES670 2.2 ANSI
Technical manual
If communication is used for line differential purposes, transmitted data consists of
three currents, clock information, trip, block and alarm signals and eight binary signals
which can be used for any purpose. The three currents are represented as sampled
values.
If communication is used exclusively for binary signals, full data capacity of the
communication channel is used for the binary signal purpose which gives the capacity
of 192 signals.
In 2 Mbit mode, telegrams are still sent using C37.94 but the HDLC part is not used.
Instead, all 12 channels of the C37.94 frame are used, and a telegram is sent whenever
a sample is available. The address field is used in the same way as in 64 kbit mode but
the CRC field is 32 bits. It carries 9 analog samples and 192 general purpose binary
signals.
Transmission of local analog data via LDCM to remote
end, function block LDCMTRN called LDCMTransmit
Identification
Function description
Transmission of analog data
from LDCM
Transmission of analog data
from LDCM, 2Mbit
Receive binary status from
remote LDCM
Receive binary status from
LDCM, 2Mbit
Receive binary status from
remote LDCM, 2Mbit
IEC 61850 identification IEC 60617
identification
LDCMTRN
LDCMTRN_2M
LDCMRecBinStat1
LDCMRecBinStat2
LDCMRecBinStat3
LDCMRecBinS2_2M
LDCMRecBinS3_2M
Section 20
Remote communication
GUID-B057C0DD-4EA8-4F6A-B57C-3395DFB38463 v2
GUID-3387F71E-020E-4556-AA55-8204340EFA47 v1
ANSI/IEEE C37.2
device number
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739